X:20=30030:x-3=1215×(30-x)=4516:y=25×y-8=1230×(9-y) =15015×y=45y:10+1=209×(15-y)...

Question 1

X:20=30030:x-3=1215×(30-x)=4516:y=25×y-8=1230×(9-y) =15015×y=45y:10+1=209×(15-y) =72x:13=2605×x+18=38100:(10-y) =2015×x=6018:x-5=4(x-30)×5=40y:25=86×y+4=2820:(y-3)=2 HelpПомогите

Question 2

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$x \div 20 = 300 \\ x = 300 \times 20 \\ x = 6000$
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$30 \div x - 3 = 12 \\ 30 \div x = 12 + 3 \\ x = 30 \div 15 \\ x = 2$
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$15 \times (30 - x) = 45 \\ 30 - x = 45 \div 15 \\ - x = 3 - 30 \\ - x = - 27 \\ x = 27$
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$16 \div y = 2 \\ y = 16 \div 2 \\ y = 8$
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$5y - 8 = 12 \\ 5y = 12 + 8 \\ 5y = 20 \: \: \: \: \: | \div 5 \\ y = 4$
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$30 \times (9 - y) = 150 \\ 9 - y = 150 \div 30 \\ 9 - y = 5 \\ 9 - 5 = y \\ y = 4$
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$15y = 45 \\ y = 45 \div 15 \\ y = 3$
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$y \div 10 + 1 = 20 \\ y \div 10 = 20 - 1 \\ y \div 10 = 19 \\ y = 19 \times 10 \\ y = 190$
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$9 \times (15 - y) = 72 \\ 15 - y = 72 \div 9 \\ 15 - y = 8 \\ 15 - 8 = y \\ y = 7$
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$x \div 13 = 260 \\ x = 260 \times 13 \\ x = 3380$
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$5x + 18 = 38 \\ 5x = 38 - 18 \\ 5x = 20 \\ x = 20 \div 5 \\ x = 4$
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$100 \div (10 - y) = 20 \\ 10 - y = 100 \div 20 \\ 10 - y = 5 \\ 10 - 5 = y \\ y = 5$
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$15x = 60 \\ x = 60 \div 15 \\ x = 4$
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$18 \div x - 5 = 4 \\ 18 \div x = 4 + 5 \\ 18 \div x = 9 \\ x = 18 \div 9 \\ x = 2$
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$(x - 30) \times 5 = 40 \\ x - 30 = 40 \div 5 \\ x - 30 = 8 \\ x = 8 + 30 \\ x = 38$
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$y \div 25 = 8 \\ y = 8 \times 25 \\ y = 200$
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$6y + 4 = 28 \\ 6y = 28 - 4 \\ 6y = 24 \\ y = 24 \div 6 \\ y = 4$
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$20 \div (y - 3) = 2 \\ y - 3 = 20 \div 2 \\ y - 3 = 10 \\ y = 10 + 3 \\ y = 13$